". . . if I had existed alone and independent of all other[s], so that I had of myself all this little whereby I participated in the Perfect Being, I should . . . be infinite, eternal, immutable, omniscient, almighty—in fine, to possess all the perfections which I could observe in God. (chapter 4, paragraph 6; Discourse on Method)

>>Based on its prefix and use in this context, the word immutable most likely means:
a) Without substance
b) Everlasting
c) Unchanging
d) Undeniable